<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        // 格式化日期 时分秒
        var date = new Date();
        console.log(date.getHours()); // 时
        console.log(date.getMinutes()); // 分
        console.log(date.getSeconds()); // 秒
        // 要求封装一个函数返回当前的时分秒 格式 08:08:08
        function getTimer() {
            var time = new Date();
            var h = time.getHours();
            h = h < 10 ? '0' + h : h;
            var m = time.getMinutes();
            m = m < 10 ? '0' + m : m;
            var s = time.getSeconds();
            s = s < 10 ? '0' + s : s;
            return h + ':' + m + ':' + s;
        }
        console.log(getTimer());
    </script>
</head>

<body>

</body>

</html>